have pny 4gb drive using for ready boost don't see an appreciable difference in boot times. mine takes a while regardless
dell e520 dual core 1.86 G 4 GB DDR ..2, SATA 750 GB hard drives using vista ultimate /xp media center edition vistaboot pro
2 dvd +/- R drives. One is LG Blu Ray/HD read also other is NEC optiarc SONY +/- drive as well.
Takes a long time booting regardless going thru boot screen before choices appear. Ran all avail tweaks to make things faster. This might be as good as it gets! buying quad 6600 processor in future as $ allows.